US10989902B2ActiveUtilityPatentIndex 63

Camera lens

Assignee: AAC ACOUSTIC TECH SHENZHEN CO LTDPriority: Jul 20, 2018Filed: Dec 30, 2018Granted: Apr 27, 2021

Est. expiryJul 20, 2038(~12 yrs left)· nominal 20-yr term from priority

Inventors:TERAOKA HIROYUKI

G02B 13/0045G02B 9/64G02B 13/06

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Claims

Abstract

The present disclosure provides a camera lens, constituted by eight lenses, and featuring excellent optical characteristics, an ultra-thin appearance, a wide angle and a bright Fno. The camera lens is configured with, sequentially from an object side: a 1st lens having a positive refractive power, a 2nd lens having a negative refractive power, a 3rd lens having a negative refractive power, a 4th lens having a positive refractive power, a 5th lens having a negative refractive power, a 6th lens having a positive refractive power, a 7th lens having a positive refractive power and an 8th lens having a negative refractive power, and satisfies specified conditional features.

Claims

exact text as granted — not AI-modified

What is claimed is: 
     
       1. A camera lens, configured with, sequentially from an object side: a 1st lens having a positive refractive power, a 2nd lens having a negative refractive power, a 3rd lens having a negative refractive power, a 4th lens having a positive refractive power, a 5th lens having a negative refractive power, a 6th lens having a positive refractive power, a 7th lens having a positive refractive power and an 8th lens having a negative refractive power, and satisfying conditional formulas (1), (2) and (4) below:
   35.00≤ v 1− v 2≤50.00  (1);
 
   35.00≤ v 1− v 3≤50.00  (2);
 
   −8.00≤ f 2/ f≤− 5.00  (4)
 
 where, 
 v1: Abbe number of the 1st lens L 1 ; 
 v2: Abbe number of the 2nd lens L 2 ; 
 v3: Abbe number of the 3rd lens L 3 ; 
 f: a focal length of the overall camera lens; 
 f2: a focal length of the 2nd lens. 
 
     
     
       2. The camera lens according to  claim 1 , satisfying a conditional formula (3) below:
   1.00≤ f 1/ f≤ 1.50  (3);
 
 where, 
 f1: a focal length of the 1st lens. 
 
     
     
       3. The camera lens according to  claim 1 , satisfying a conditional formula (5) below:
   −8.00≤ f 3/ f≤− 5.00  (5);
 
 where, 
 f3 a focal length of the 3rd lens. 
 
     
     
       4. The camera lens according to  claim 1 , satisfying a conditional formula (6) below:
   0.30≤ f 7/ f≤ 1.50  (6);
 
 where, 
 f7: a focal length of the 7th lens. 
 
     
     
       5. The camera lens according to  claim 1 , satisfying a conditional formula (7) below:
   −1.00≤ f 8/ f≤− 0.30  (7);
 
 where, 
 f8: a focal length of the 8th lens.

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